1550NM DIRECT MODULATED TRANSMITTER

1550NM Direct Modulated Transmitter delivers high performance signal transmission of NTSC, PAL, ATC, QAM, and related digital information for CATV and/or telephony applications.

  • Model: HKTOT-1550
  • Brand: HKT
  • Application: CATV
  • Packing way: Carton box
  • Warranty: 1 year

Product Description

HKTOT-1550 Direct Modulated Transmitter delivers high performance signal transmission of NTSC, PAL, ATC, QAM, and related digital information for CATV and/or telephony applications. It is based upon custom high-linearity optically isolated DFB (Distributed Feedback) lasers, specifically designed for multi-channel AM video applications. The built-in control circuits provide an exceptionally low noise and inter-modulation characteristics. Automatic output power control, coupled with temperature stabilization provided by a thermoelectric cooler ensures maximum performance and longer laser life.

The units are packaged in slim 1.75-inch high (1RU), 19-inch aluminum rack-mounted enclosures. Each unit is fitted with redundant self-contained power supplies with 90-265VAC inputs.

All internal laser parameters and monitoring functions are under microprocessor control: the front panel displays status information related to laser operation, temperatures, and RF input.


Main Features


  • Transmits NTSC, PAL, ATC, and related digital information for CATV and/or telephony applications.

  • Available in a variety of output levels.

  • High linearity, optically isolated, distributedAM feedback DFB laser.

  • 54-1000MHz RF input bandwidth.

  • Front panel laser diode and rear panel RF input test points (-20dB).

  • Operation wavelength: 1550nm.


Product Specification


TypeItemValuesNotes
GeneralOperating temp. (ºC)0 – 5032 – 122 ºF
Storage temp. (ºC)-40 – 85
Operating relative humidity (%)5 – 95Non-condensing
Power supply (Volt AC)100 – 240
Power consumption (W)25
Size (WxDxH in inches)19×14.25×1.75
Interface portRJ45, RS232
OpticalWavelength (nm)1530 – 1563
Output power (dBm)6 and 10Depending on model
Optical connectorSC/APC
RFRF bandwidth (MHz)45 – 1000
Input level (dBmV)15 – 25AGC
Flatness (dB)-0.75 –  +0.75
Return loss (dB)1675Ω impedance
RF connector (main input)F type
CSO (dB)-5778 channel load, back to back at 0dBm receive power
CTB (dB)-63



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